_sim_activate_after 9009 src/simh/scp.c return _sim_activate_after (uptr, usec_delay);
_sim_activate_after  121 src/simh/scp.h t_stat _sim_activate_after (UNIT *uptr, uint32 usecs_walltime);
_sim_activate_after 3217 src/simh/sim_tmxr.c return _sim_activate_after (uptr, usecs_walltime);